Cannot add a specific third SSD to an Intel RST RAID 0

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therealduckofdeath

therealduckofdeath

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May 10, 2012
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I'm trying to increase the size of my RAID 0 from two disks to three.
The Intel controller sees the third disk fine but it won't let me add it to the RAID 0.
Any suggestions?

Here are a couple of screenies from the Intel RST utility. First the current status and second the view when I try to expand the RAID. As you can see, it will only let me add the mechanical disk to the RAID 0.

https://imgur.com/a/acxwh

I kind of suspect it's because the third disk is 10 GB smaller than the first two. But, should that really matter on a RAID 0? Do I really have to recreate it from scratch or do anyone out there have a better suggestion?
 
Solution
mcconkeymike
I'm pretty sure that if you were able to decrease the partition size on the 2 current SSDs to equal the size of the new SSD, then you "should" be good to go. Yes the 10gb size difference is the problem. RAID requires the same size partitions.
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mcconkeymike

mcconkeymike

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I'm pretty sure that if you were able to decrease the partition size on the 2 current SSDs to equal the size of the new SSD, then you "should" be good to go. Yes the 10gb size difference is the problem. RAID requires the same size partitions.
 
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Solution
therealduckofdeath

therealduckofdeath

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Dagnabbit. I kind of knew that already. I was just hoping there would be an easy workaround. And the Intel RST "controllers" aren't particularly advanced, so there is obviously no option to tinker with arrays like that. I guess I'll have the joy of a full reinstall. Again... And my 80 gigglebyte download of BF1 just completed. \o/

Yes, I know that RAID 0 is all fun and no safety. It's a PC, so not a major disaster if the C drive is lost. Anything important is on the cloud backed up mechanical drive.
 
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therealduckofdeath

therealduckofdeath

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Woop! Woop! I went and did the full reinstall... The result was a bit better than I expected, as the old set-up wasn't that far off the SATA interface speed bottleneck. I jumped from the 82% percentile to the 96% percentile on PassMark's disk benchmark. :)

https://imgur.com/a/Xto43
(Disclaimer on the "before" data accuracy? It does sound like too much of an improvement to be true)

...Now to fun re-downloading of all the stuff. :p
 
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mcconkeymike

mcconkeymike

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Nice, glad you were able to get it set up fairly easily. I used to run 2 240gb SSDs in RAID0 and it ran great until one day I started getting slower speed than a single SSD. I broke the RAID and reloaded on a single SSD with the other as a game drive and both were still 100% good to go with proper speeds, the whole issue was weird. Since then I haven't gone back to RAID0 and really don't plan on it. I'm glad it is working for you and good luck.
 
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